fix(docs): remove malicious polyfill.io script reference

[FBumann]

Problem

The docs embed https://polyfill.io/v3/polyfill.min.js?features=es6 (an old MkDocs-Material/MathJax recipe). The polyfill.io domain was sold in 2024 and now serves malware as part of a supply-chain attack. Visitors to the docs were shown a suspicious login prompt originating from https://polyfill.io:

The script only existed to backfill ES6 features for legacy browsers (IE11) and is unnecessary today, so it is removed without replacement.

Changes

• Remove the polyfill.io entry from extra_javascript in mkdocs.yml → fixes all future doc builds

Already done out-of-band

The script tag was baked into 4,530 deployed HTML files across all doc versions (2.0.0–6.1.4) on gh-pages. Those were scrubbed directly and pushed in gh-pages commit a4e2663e — the live site is already clean.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Removed an external polyfill dependency from the documentation site configuration. This simplifies the site's dependency management while maintaining support for modern browsers.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 88f1318a-f67d-4c75-ba9f-ed46326b67c7

📥 Commits

Reviewing files that changed from the base of the PR and between 1a0feb7 and e5aa647.

📒 Files selected for processing (1)

• mkdocs.yml

💤 Files with no reviewable changes (1)

• mkdocs.yml

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📝 Walkthrough

Walkthrough

The polyfill.io ES6 polyfill script is removed from the MkDocs site configuration. MathJax and Plotly script entries remain unchanged in the extra_javascript list.

Changes

Polyfill configuration cleanup

Layer / File(s)	Summary
Remove polyfill.io ES6 script mkdocs.yml	The polyfill.io/v3/polyfill.min.js?features=es6 entry is removed from extra_javascript, leaving MathJax and Plotly script references intact.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A hop and a skip, away flies the old,
No polyfill needed, the story retold,
Modern browsers stand strong on their own,
Cleaner config, simpler throne! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: removing the malicious polyfill.io script reference from the documentation configuration.
Description check	✅ Passed	The description provides clear context about the security issue and changes, but lacks some template sections like Type of Change checkbox, Related Issues, and Testing sections.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/remove-malicious-polyfill-io

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